TW200939824A - Interference reduction request in a wireless communication system - Google Patents

Abstract

Techniques for transmitting data with short-term interference mitigation in a wireless communication system are described. In one design, a first station (e.g., a base station or a terminal) may send a first message to at least one interfering station to request reduction of interference on at least one resource. The first station may send the first message in anticipation of receiving data on the at least one resource. An interfering station may receive the first message from the first station and may reduce interference on the at least one resource by reducing its transmit power and/or by steering its power in a direction different from the first station. The first station may thereafter receive data from a second station on the at least one resource. The techniques may be used for data transmission on the forward and reverse links.

Description

200939824 IX. DESCRIPTION OF THE INVENTION: TECHNICAL FIELD OF THE INVENTION The present disclosure relates generally to communications, and more particularly to data transmission techniques for wireless communication systems. The present application claims priority to US Provisional Application No. 6 1/025,564, filed on Feb. 1, 2008, entitled "METHOD AND APPARATUS FOR SHORTTERM INTERFERENCE AVOIDANCE" The case has been assigned to its assignee and incorporated herein by reference. [Prior Art] Wireless communication systems are widely deployed to provide various communication content such as voice, video, packet data, messaging, broadcast, etc. Such wireless systems may be multiple access systems capable of supporting multiple users by sharing available system resources. Examples of such multiple access systems include code division multiple access (CDMA) systems, time-sharing multiple memory Take (TDMA) system, frequency division multiple access (FDMA) system, orthogonal FDMA (OFDMA) system, and single carrier ❹-FDMA (SC-FDMA) system. Wireless communication system can include many communication that can support many terminals. Base station. The terminal can communicate with the base station via the forward link and the reverse link. - The forward link (or downlink) refers to the communication link from the base station to the terminal, and the reverse link Or uplink) refers to the communication link from the terminal to the base station. The base station can transmit data to one or more terminals on the forward link and can receive from one or more terminals on the reverse link. Information. On the forward link 136198.doc 200939824, data transmissions from the base station can observe interference due to data transmission from neighboring base stations. On the reverse link, data transmission from each terminal Interference due to data transmission from other terminals communicating with neighboring base stations can be observed. For both the forward link and the reverse link, the interference due to the interfering base station and the interfering terminal Techniques can be degraded. Therefore, there is a need in the art for techniques to mitigate interference in order to improve performance. [Disclosed herein] Techniques for transmitting data in short-term interference mitigation in a wireless communication system are described herein. To mitigate (eg, avoid or mitigate) interference from interfering base stations or interfering terminals to improve efficiency b. Interference mitigation can be short-term and applicable to a packet, one Packets, frames, a group of frames, etc. Interference mitigation can be invoked when high interference is observed (rather than always). These techniques can be used for data transmission on the forward and reverse links. In the design, a first station may generate a first message to request to mitigate interference. The first message may include information identifying at least one resource to be mitigated, an indication of priority of the request, and target interference of the first station. Level, spatial information for beam steering, and/or other information. For example, if the data is expected to be received on at least one resource, the first station can send the first message to at least An interference station requests to mitigate interference on the at least one resource. Thereafter, the first station can receive data from a second station on the at least one resource. In one design, an interfering station may receive the first message from the first station 136198.doc 200939824. The interfering station can decide whether to grant or discard the request based on, for example, the priority of the request. The interfering station may mitigate interference on the at least one resource by reducing its transmission power on the at least one resource and/or by manipulating its power in a direction different from the first station. For data transmission on the forward link, the first station can be a terminal, and the second station can be a servo base station. The terminal may receive a second message from the servo base station to trigger short-term interference mitigation and may send the first message to request mitigation of interference in response to receiving the second message. For data transmission on the reverse ® link, the first station can be a servo base station and the second station can be a terminal unit. The servo base station can receive a resource request from the terminal and can send the first message in response to receiving the resource request. Various aspects and features of the present disclosure are described in further detail below. [Embodiment] The techniques described herein may be used in various wireless communication systems, such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA, and other systems. The terms "system" and "network" are often used interchangeably. CDMA systems can implement radio technologies such as Universal Land Radio Access (UTRA), cdma2000, and the like. UTRA includes Broadband CDMA (WCDMA) and other variants of CDMA. Cdma2000 covers the IS-2000, IS-95 and IS-856 standards. A TDMA system can implement a radio technology such as the Global System for Mobile Communications (GSM). The OFDMA system can implement radio technologies such as Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM®, and the like. UTRA and E-UTRA are part of the General Mobile Telecommunications System (UMTS) 136198.doc 200939824 points. 3GPP Long Term Evolution (LTE) is an upcoming version of UMTS that uses E-UTRA, which uses OFDMA on the downlink and SC-FDMA on the uplink. UTRA, E-UTRA, UMTS, LTE, and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3Gpp). Cdma2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). 1 shows a wireless communication system 100 that can include a number of base stations 11 and other network entities. The base station can be a fixed station that communicates with the terminal and can also be referred to as an access point, a node, an evolved node β, and the like. Each base station 11 can provide communication coverage for a particular geographic area. The term "cell" may refer to the coverage area of the base station and/or the base station subsystem that serves this coverage area depending on the context in which the term is used. The base station can provide communication coverage for a giant (macr〇) cell, a pico cell, a femto cell, and/or other types of cells. A jumbo cell can cover a relatively large geographic area (e.g., a few kilometers in radius) and can support communication for all terminals in the system that have service subscriptions. The microcell can cover a relatively small geographic area and can support communication for all terminals with service subscriptions. The femto cell can cover a relatively small geographic area (e.g., a home) and can support communication with a group of terminals (e.g., terminals belonging to residents of the home) having an association with the picocell. The terminal supported by the pico cell can belong to a closed subscriber group (CSG). The techniques described herein are applicable to all types of cells. System controller 130 can be routed to a set of base stations and provide coordination and control for such base stations. System controller 130 can be a collection of single network entities or network entities. System controller 130 can communicate with the base station via the backhaul, 136198.doc 200939824 for the sake of brevity' which is not shown in the figures. ❹ 终端 The terminal (4) can be distributed throughout the system, and each terminal can be fixed or mobile. The terminal can also be referred to as an access terminal, a mobile station user device, a subscriber unit, a station, and the like. The terminal can be a cellular phone, a PDA, a wireless data device, a wireless communication device, a palm-sized device, a laptop, a cordless telephone, a wireless area loop (WLL), and the like. The terminal can communicate with the feeding base station and can cause interference to one or more interfering base stations and/or receive interference from the one or more interfering base stations. The servo base station is a base station designated to feed the terminal on the forward and/or reverse keyway. The interfering base station is a base station that causes interference to the terminal on the forward key path. The secret money is the terminal that causes the money to interfere with the base station. In the picture! The solid line with double arrows indicates the desired data transmission between the terminal and the servo base station. A dashed line with double arrows indicates interference transmission between the terminal and the interfering base station. The system supports HARQ to improve the reliability of data transmission. For HARQ, the transmitter can transmit data transmissions and optionally send one or more additional transmissions until the data is correctly decoded by the receiver or the maximum number of transmissions have been sent or some other termination condition has been encountered. Figure 2 shows an example data transfer on the reverse link in the case of HARQ. The transmission timeline can be divided into several frame units. Each frame can cover a predetermined duration, for example, 1 millisecond (ms). The frame can also be called a sub-frame, a time slot, and the like. A terminal may have data to be sent on the reverse link and may send a resource request (not shown in Figure 2). A servo base station can receive resources 136198.doc -10- 200939824 and can return the resource grant. The terminal can process a data packet and can transmit the transmission of the packet on the granted resource. The servo base station can receive transmissions from the terminal and decode the packet. If the packet is decoded correctly, the servo base station can send an acknowledgment (ACK), or if the packet is erroneously decoded, the serving base station can send a negative acknowledgment (NAK). The terminal can receive ACK/NAK • feedback, send another transmission of the packet when the NAK is received and terminate or transmit the transmission of the new packet upon receiving the • ACK. One HARQ interlace with indices 0 ® to M-1 may be defined for each of the forward link and the reverse link, where Μ may be equal to 4, 6, 8, or some other integer value . The HARQ interlace set can be referred to as a HARQ enforcement individual. Each H ARQ interlace set may include a frame separated by frames. For example, the HARQ interlace set m may include frames m, m+M, m+2M, etc., where we{0, . . . , M-1}. The packet can be sent on a HARQ interlace set and all transmissions of the packet can be sent in a frame separated by frames. Each transmission of a packet can be referred to as a HARQ transmission. The HARQ interlace set of the forward link can be associated with one HARQ interlace set of the reverse link. In one design, the HARQ interlace set m on the forward link may be associated with the HARQ interlace set r={(w + A) mod M} on the reverse link, where Δ is the forward link and the reverse chain The frame offset between the roads, and "mod" represents the modulo operation. In one design, Δ may be equal to M/2, and each HARQ interlace set on the forward link may be associated with a HARQ interlace set of M/2 frames on the reverse link. The system can use orthogonal frequency division multiplexing (OFDM) or single carrier frequency division multiplexing (SC-FDM) for each of the forward link and the reverse link. OFDM and 136198.doc -11 - 200939824 SC-FDM divides the system bandwidth into multiple (square) orthogonal subcarriers, which are also commonly referred to as carrier tones, bins, and the like. The spacing between adjacent subcarriers can be fixed' and the total number of subcarriers (κ) can depend on the system bandwidth. For example, K can be equal to 128, 256 '512, 1024, or 2048 for system bandwidth 丨 25, 2.5, 5, 10, or 20 MHz, respectively. Data can be used to modulate each subcarrier. In general, 〇FDM is used to transmit modulation symbols in the frequency domain and SC-FDM is used to transmit modulation symbols in the time domain.

❹ In one design, a total of K subcarriers can be grouped into resource blocks. Each resource block may include one subcarrier in one time slot (eg, Ν=12 subcarriers). The one-time slot can span 〇·5 ms or some other duration. The available resource blocks can be assigned to the terminal for data transmission. In another design, a channel tree can be used to identify resources. The channel tree can constrain the grouping of resources, which can alleviate the burden of transporting such resources. Figure 3 shows the design of the channel tree 3 for the status of 32 subcarrier sets available. The per-subcarrier set may include a predetermined number of subcarriers. In the channel tree 300, '32 nodes can be formed in layer 1 using 32 subcarrier sets, and 32 nodes in layer 1 can be used to form i6 nodes in layer 2. Layer 2 can be used: 16 ip points In the layer 3, a person node is formed, and eight nodes in the layer 3 can be used to form four nodes in the layer 4, and four nodes in the layer 4 can be used to form two nodes in the layer 5, gα. The two nodes in layer 5 are used to form a point in layer 6. Each of the layers 2 through 6 can be formed using § 1 to immediately use two of the nodes in the lower layer. For example, each node in the β 'frequency I tree assigns a unique channel identifier (1 [shown in Figure 3, which can be from #上下下 and for each layer from left to right ji 136198.doc -12· 200939824 Numbered channel 1D. The top node can be assigned a channel ID Ο 2 which can include all 32 subcarrier sets. Channel IDs 31 to 62 can be assigned to the lowest layer of the coffee and can be referred to as the base node. The tree structure shown in 3 imposes a specific restriction on the assignment of subcarriers. For each node of m and t, all nodes that are subsets (or descendants) of the assigned node are restricted and the assigned node is treated as a subset. All = points. The restricted nodes are not used simultaneously with the assigned node, so that no two nodes use the same set of subcarriers at the same time. The available frequency and/or time resources can also be segmented and identified in other ways. The K subcarriers are divided into subbands. Each subband may include a predetermined number of subcarriers, for example, 72 subcarriers at i 〇 8 MHz. The terminal may be on the forward link and/or the reverse link. Communicate with the servo base station On the forward link, the terminal can observe high interference from the interfering base station. For example, if the servo base station covers the micro cell or the pico cell and has a transmission power far lower than the interference base station, it may be In this case, on the reverse link, the servo base station can observe high interference from the interfering terminal. The interference on each link can degrade the performance of the data transmission transmitted on the link. Interference mitigation can also manipulate the interference. Transmission away from stations where high interference is observed. In one aspect, short-term interference mitigation can be used to mitigate (eg, avoid or mitigate) interference on a given link in order to improve the performance of data transmission. Interference mitigation can block or reduce interference transmission. The transmission power is such that a higher signal to noise and interference ratio (SINR) can be achieved for the desired data transmission. A set of messages and/or a set of control channels can be used to support the forward link (FL) and 136198.doc 200939824 The momentary interference on the link (RL) can be used for short-term interference mitigation - and /. According to one design, the table 1 is previously known to transmit, and The pilot is a transmitter and a preamble, a training sequence, etc. A message that can be referred to as a reference signal, pre-emission information, rather than its content, is considered to be in the signal itself.

Table I Message/Pilot ❹ Interference Mitigation Trigger A message that transmits a capability request and requests the terminal to clear the previous interference. The FL resource grants the RL resource grant to mitigate the interference request. The power determines the pilot. It interferes with the base or the secret. The pilot to be transmitted by the interference base station or the interference terminal on the specified resource and/or the beam direction. ❹ Resource quality indicator Indicates the channel quality of the specified resource. The name of Table 1 can also be referred to by other names. For example, the interference mitigation trigger message may also be referred to as a pre-forward link assignment block (pre-FLAB), or the transmission capability request message may be referred to as a pre-reverse link assignment block (pre-RLAB). The FL resource grant is referred to as a forward link assignment block (FLAB). The rl resource grant may also be referred to as a reverse link assignment block (RLAB), and the mitigation request message may also be referred to as a resource utilization message ( RUM). Different and/or additional messages can also be used for short-term interference mitigation. 136198.doc -14- 200939824 may also transmit information carried by the messages in Table 1 in other ways. For example, one can be 一1έ8~ In the case of a case, 5 is sent instead of a pilot _transport to be in a position to complain about the eclipse of the eclipse, a poor/original use = Lifeng level ...for the sake of clarity, the information shown in Table 1 is used in the following. Nx makes ·:='=light interference request message to achieve short-term interference mitigation... = These messages compete for resources on the forward key and can also be sent by some ❹ ❹ = to compete for resources on the reverse key. Such information; on the short-term basis, the orthogonalization of data transmission across adjacent cells is enabled. Generally, resources can cover any frequency and/or time dimension and can be delivered in any manner. For example, as shown in Figure 3, in one design, resources may cover variable frequency dimensions and may be identified by the channel ID of a node on the channel tree. In another design, the resources may cover a fixed frequency dimension, such as 'a predetermined number of subcarriers. Resources can also cover fixed or variable durations. As the m resource, a specific sub-band, a special resource block, a specific time frequency block, and the like of a specific pure towel may be covered. The figure shows the data transfer to the previous link in the presence of interference. The servo base llGx can transmit the transmissions to the terminal 120x on the forward link. The terminal can also self-interfere with the base station u to receive the interference carrier. This interference transmission may be expected for another terminal not shown in FIG. If the desired data transmission and interference transmission are transmitted on the same resource, the terminal 120x may not be able to decode the data transmission from the servo base station. The terminal 120 may not communicate with the interfering base station 110O for the purpose of data transmission. However, the terminal device 12 may be able to reliably transmit a message to the interfering base station 110y and receive a message from the interfering base station 11A. In a design of 136198.doc 200939824, such as the table! Messages for the messages displayed in the messages can be sent on resources configured for such messages. These messages can be avoided as a result of interference from other transmissions. In general, the message for short-term interference mitigation can be sent in any manner such that it can be reliably received by the receiving base station/terminal (even when there is a primary supporter). Figure 5 shows the phase of the design of the scheme 5 〇 0 of the previous link data transmission in the case of short-term interference mitigation. (4) The base station may have the information to be sent to the terminal and may know that the terminal observes high interference on the forward link. The servo base station can receive pilot measurement reports from the terminal, and the reports can indicate and/or identify strong interference base stations.词 The vocabulary base station can send an interference mitigation trigger message (or simply a trigger message) to the end (4) to trigger short-term interference mitigation. The trigger message can guide the terminal to request to interfere with the base station to mitigate the interference on the forward key path. The feed σ can also send a trigger message to get an accurate channel quality report from the terminal. This report can be used to make decisions regarding short-term interference mitigation. The trigger message identifies the interference to be mitigated—or multiple specific resources, priority of the data to be sent, and/or other information. The channel identifier, the sub-band index, and the resource block of the channel tree can be used to receive the trigger message from the base station, and the interference reduction request message can be sent to the link in the frame. In one design, the terminal can send the mitigation request message only to the base station that is the primary interferer of the terminal on the forward key. The terminal can identify the base stations to the link pilots based on the reception of the primary interfering stations, such as &. In another design 136198.doc 16· 200939824 Z neighbors = can send the mitigation request message to the receiving message... σ °A body, the mitigation request message can be sent to the =: Taiwan Broadcast messages, multicast messages sent to the group base station, or broadcast messages to all base stations. In any condition τ, the decrement: request message can be interfering with the base station mitigation - or on a plurality of designated resources. For example, blocking the transmission on the specified resource, reducing the transmission power to a beam steering in the direction of: the end machine. Mitigating interference ❹ δ δ ^ ° ^ The urgency priority measure of ambiguity, which can be used by the interfering base station in making the decision about the initial grant or rejection of the request. The amount of priority that can be directly obtained from the interference mitigation trigger message or can be sent by other means 2 疋 specified resources and mitigation interference request message A

:in=5: displayed, the △ message == light interference request message can be started when the trigger message is received, where △ can be between the forward link HARQ and the reverse keyway Q interlaced set Fixed offset. The mitigation request message can be received from the terminal and can be determined based on transmission on its forward link source. The interfering base station can receive two pairs of each designated resource_the transmission power bit used by him::=: determine the priority measure in the specified resource information. The interfering base station can determine whether to grant or not based on the signal. If the σ is discarded, the status of the key buffer is reduced, and the interference request message is mitigated. The interfering base station can also: / or content:: The received power of the machine to mitigate the interference request message ^ 传输 it will be used for the transmission power bit of each specified resource 136198.doc -17- 200939824. For example, the interfering base station can estimate the path loss of the terminal based on the received power from the mitigation request message from each terminal. The interfering base station can then determine the transmission level to be used based on the estimated path loss of the terminal and the target interference level of the other terminal. In one design, the "interfering base station" may transmit the transmission power material via a power-determining pilot that is used to transmit the power level (or associated transmission power level) of the resource for each specified resource in the corresponding resource. 1 The data 16 should be the same frequency as the resource minus but can be generated in the same-forward link HAR (^ on the wrong set before the frame. The interference base station can transmit power on the corresponding resource in the frame (10). Pilot, and the transmission power level of the pilot may be correlated (eg, equal to) the transmission power level that the interfering base station intends to use in the frame (4) for the specified resource. The transmission power bit of the pilot indication via the power determination Can be a tentative transmission power decision. Interfering base station can use higher or lower transmission power levels on the e 胄 resource based on quality of service (Q〇S), channel quality conditions, and/or other factors. Although not shown in Figure 5, the servo base station may also receive interference mitigation requests from other terminals that observe high interference from the base station. The servo base station can determine the pilot transmission to other terminals. The machine may broadcast the power decision pilot to all terminals that can receive the pilot. The terminal may receive the power decision pilot from all the interfering base stations and may estimate the channel quality of each-specified resource based on the received pilot. Determining the pilot allows the terminal to estimate the channel quality more accurately. The final channel is based on the estimated channel quality of the specified resource and the estimated interference level. J36198.doc • 18- 200939824

The resource quality indicator for this resource. For example, it may be based on: (1) determining the channel quality based on the pilot from the serving base station and (8) determining the RQI value of the given resource based on the interference estimated from the pilot of the interfering base station. The terminal can also determine the (single) value of all (4) resources. In any case, the RQI value may indicate the value of the resource, the data rate, or some other information of the resource covered by the RQI value. The terminal can send RQI information containing the corresponding resource's - or multiple RQI values in the frame. The teacher information can also be referred to as channel quality indicator (CQJ) information. The servo base station can schedule the terminal from the pure RQI information of the terminal and can transmit the data on one or more of the assigned resources. Each assigned resource may correspond to all or a subset of the specified resources. The vocabulary base station can select modulation and coding schemes (mcs) based on the RQI information of the assigned resources. The MCS can also be referred to as a transport format, a packet format, a rate, and the like. The feeding base station can process the information of the terminal according to the MCS. The Serving Base Station may generate a fl resource grant, which may include assigned resources, MCS, and/or other information. The serving base station can send FL resource grants and data transmissions to the terminal in the frame ί+2Μ. The terminal can receive FL·resource grants from the servo base station and obtain the assigned source and MCS. The terminal can receive the data transmission on the assigned resource' to receive the transmission according to the MCS decoding and generate an ACK or NAK based on the decoding result. The terminal can send an ACK or NAK to the servo base station in the frame Δ+2Μ. If a NAK is received, the servo base station can transmit another data transmission in frame ί+3Μ and if an ACK is received, the servo base station can terminate or transmit a new data transmission. I36198.doc •19- 200939824 Figure 5 shows the specifics of short-term interference mitigation on the forward link. Other designs can be used to implement short-term interference mitigation on the forward link. The mitigation request message may request the interfering base station to manipulate its power by reducing the transmission power (as described above) and/or by beaming in the direction of the (10) termination (eg, by placing the terminal in a spatial null value) Medium) to mitigate interference. Z performs beam steering based on Μ information '(4) information may include precoding weights such as precoding matrices or vectors), channel estimates and/or power used by the transmitter, other information. The mitigation request message can be obtained or provided in various ways, and the mitigation request message can include the terminal (10). The spatial channel between the interfering base station and the terminal can be known to interfere with the base station (e.g., 'on a long-term basis). In another design, the message can be sent to the interfering base station in a unicast manner, and the message can include information about the spatial channel or preferred beam between the base station and the terminal. In yet another design, a reciprocal relationship between the forward link and the reverse link can be employed (e.g., due to the use of time division double guard (tdd)). The interfering base station can then estimate the reverse link channel of the terminal based on the message and can use the reverse link channel estimate as the forward link channel estimate. For all designs, the interfering base station may derive precoding weights based on information about the spatial channels or may provide precoding weights. The interfering base station can then perform beam steering using precoded weights. In the case of the towel, the interfering base station can determine the pilot using the transmission power level transmission power used on the designated resource. In another design, the interfering base α does not transmit power to determine the pilot and does not respond to the reduced interference interference request message from the terminal. In this design, it can be assumed that the dry 136198.doc -20- 200939824 scrambling base station will not be transmitted on the designated, carefully, and the premises, and it can be determined that R does not interfere with the interference base station). In the re-design, if the interfering base station will not transmit on the specified resource, then it will not transmit the power to determine the pilot or message, = right it will be in the specified resource, (4) transmission (four) the pin pilot or signal ❹ in ° In addition, the interfering base station can transmit a message containing the transmission power level that it will use on the designated resource. In a re-design, the interfering base station can provide spatial information in the power decision pilot. For example, in addition to the transmission power level that is not used in future resources, the interference base port may also refer to the beam direction. The interfering base station can achieve this by adjusting the transmission power of each of the transmitting antennas at the base station. In the re-designation, the interfering base station may transmit (4) information (10), such as precoding weights, separate from the power decision pilot and other than the power decision pilot. In the item, the interfering base station can mitigate the interference to a HARQ transmission. 4 Transmission can be used for the first transmission of the packet. The same procedure can be repeated for each transmission to mitigate interference. In another design +, the interfering base station can mitigate interference to L HARQ transmissions (e.g., on the same harq! error set) where L can be any integer value. For example, the &' can be processed (e. g., encoded and modulated) such that it can be reliably decoded after a target number of har(10) losses, and L can be equal to this target number. In yet another design, the interfering base station can mitigate interference with multiple HARQ interlace sets. The identifiers of the HARQ interlace sets may be conveyed in the interference mitigation trigger message and/or the mitigation interference request message. Alternatively, such harq interlaced sets may be known in advance for all base stations and terminals and will not need to be transmitted. Figure 6 shows the data transfer on the reverse link in the presence of interference. End 136198.doc 200939824 The terminal 120x can transmit data transmission to the servo base station 110x on the reverse link. The servo base station 110x can also receive interference transmission from the interference terminal 12〇y. This interference transmission may be expected for adjacent base stations 11 〇 y. If the desired data transmission and interference transmission are transmitted on the same negative source, the servo base station 1 may not be able to decode the data transmission from the terminal unit 12〇χ. The terminal 12 (^ may not communicate with the base station 11 〇 y for the purpose of data transmission. However, the terminal 120 χ may be able to reliably transmit the message to the base station 11 〇 y and receive from the base station 1 1 〇 y Similarly, the interfering terminal 丨2〇y may be able to reliably exchange messages with the servo base station 11. Figure 7 shows a timing diagram of the design of the scheme 700 for reverse link data transmission in the case of short term interference mitigation. The terminal may have data to be sent to the servo base station and may send a resource request in the frame ί. The resource request may include a buffer size at the terminal, an indication of the urgency of the resource request, etc., because the resource request is usually not carried. Regarding the information of a specific resource, the resource request can be sent in any frame. The servo base station can receive the resource request and can send a transmission capability request message to the terminal in the frame ί+Δ to inquire the terminal on the specific resource. The transmission power capability, for example, to request the terminal to transmit power on a designated resource determines the pilot. The transmission capability request message may include the priority amount of the request. And/or other information. The servo base station may also send a mitigation request message on the forward link in the frame ί+Δ to request the interfering terminal to mitigate interference on the specified resource (eg, to block or reduce its transmission power). Up to an acceptable level. The mitigation request message may include a priority measure indicating the urgency of the request, which may be used by the interfering terminal to make a decision regarding whether to grant or reject the request. The escaping base station may be in the same message 136198. Doc 22- 200939824 ΤΙ: shown in Figure 2) or send a transmission capability request and mitigation request message in different frames. ❹ ❹ Phase (4) The base station receives the transmission capability request message and can also: From the middle neighbor only: the station receives the interference mitigation request message... For the sake of brevity, it is not a neighboring base station. The terminal can be based on the priority contained in the mitigation request message from the base station: 丄 = obey the message. The terminal device can then determine the maximum transmission power that can be used on the designated resource based on the terminal device's suffocation = suffocation. The mitigation request message from each neighboring base station can refer to the interference amount that the base station can tolerate and can τ 馊 且 且 且 = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = The terminal can estimate the path loss of the base station based on the known transmission power level and the received power level of the mitigation request message from each of the neighboring base stations. The terminal can use equal path loss for the forward and reverse links and can determine the maximum transmission power level that the terminal can use to meet the interference requirements of each adjacent base station. The terminal can determine the pilot to deliver the transmission power level via the power transmitted by the maximum transmission power level (or the scaled transmission power level) on the corresponding resource. The corresponding resource may cover the same frequency as the specified resource but may occur on the same reverse key HARQ interlace set before the % frames. The terminal can transmit the power decision pilot on the corresponding resource in the frame (10), and the transmission power level of the pilot can be the maximum transmission power level of the resource that the terminal can use in the frame (1). In the message frame △, the transmission capability request message from the feeding base station can also carry the recommended transmission power bit of the power decision pilot 136I98.doc -23· 200939824 ==, the terminal can be based on the self-adjacent base The mitigation of the reception of the station is not tuned to adjust the recommended transmission power level. 5 soil also. From the terminal and interference, and based on the received 邋 phase from the dry and 弋 pilot frequency pilots, the servo base can be allowed to determine the channel quality and interference more smoothly.参 References. The feeding base station can estimate the interference based on the pilot from the interfering terminal based on the pilot estimated channel quality from the terminal, and determine the Mcs of the terminal based on the channel quality estimation and the interference estimation. The servo base station can transmit the scheduled terminal according to the MCS for the data on the specified resource. The feeding base station may generate RL resource grants, which may include assigned resources, (10), assigned transmission power levels to be used for the assigned resources, and/or other information. The assigned transmission power level can override (GverHde) the transmission power level of the pilot indication via power. The servo base station can send the RL resource grant to the terminal in the frame. The terminal can receive the RL source from the feeding base station and obtain the assigned resources, listen to 8, and so on. The terminal can send data transmission on the assigned resource in the frame (+2M. The servo base station can receive f(4) input from the terminal, decode the received transmission, and generate ACK or NAK based on the decoding result. The servo base station can The ACK or NAK is sent to the terminal in the frame Δ+2Μ. If the NAK is received, the terminal can send another data transmission wheel in the frame ί+3Μ, and if the ACK is received, the terminal can Termination or transmission of new data transmissions. Figure 7 shows the specific design of short-term interference mitigation on the reverse link. Other designs can also be used to implement short-term interference mitigation on the reverse link. In the design shown in Figure 7, the terminal can The maximum transmission power level transmission power that can be used on the specified resource 136198.doc •24·200939824: rate:::::delivery contains its TM source...two ί in one design 'interference terminal can reduce the pair - One HARQ transmission = two transmissions can be used for the first transmission of the packet. The same procedure can be repeated for each harq transmission to mitigate interference. In another design, the machine can mitigate interference to U@HARQ transmission (for example, in the same Position (10)

On the wrong set) ' where L can be any integer value. In yet another design, the interfering terminal can mitigate interference with multiple HARQ interlace sets. Figure 8 shows that it is not designed for multiplexing forward link data transmission and reverse link data transmission in the case of short-term interference mitigation. Fig. 8 can be obtained by superimposing Fig. 5 and Fig. 7. For the sake of brevity, shades of gray are not used for all transmissions of data sent on the forward link. As shown in Figure 8, the data transmission on the forward and reverse links can be efficiently multiplexed. 5 and 7 show the forward link transmission from the servo base station and the interfering base station on a forward link HARQ interlace set and the reverse link transmission from the terminal set on a reverse link HARQ interlace set. design. As described below, these designs simplify the operation of short-term interference mitigation and provide other advantages. For the forward link short-term interference mitigation scheme shown in FIG. 5, the interference mitigation trigger message may cause the mitigation request message to be sent after T and the frame, and the mitigation request message may cause the power to determine the pilot at T2. After the frame is sent 'power decision pilot, the RQI information can be sent after 3 frames. rqi 136I98.doc •25- 200939824 The information can be transmitted after I frame, in which τ, D2, & And D 4 can each be any suitable value. As shown in Figure 5, if Τ1+Τ2+Τ3 + Τ4=Μ, the forward link transmission can be sent on one HARQ interlace set. As also shown in Figure 5, if T2+T3 = m, reverse link transmissions can be sent on one HARQ interlace set. For the reverse link short-term interference mitigation scheme shown in FIG. 7, the transmission capability request message may cause the power decision pilot to be transmitted after eight frames, and the power decision pilot may grant the RL resource to the Tb frame. After sending, the rl resource grant enables the data to be transmitted after Te frames, where Ta, and τ can each be any suitable value. As shown in Figure 7, if Ta + Tb = M, the forward link transmission can be sent on one HARQ interlace set. Also as shown? As shown in the figure, if Tb+TC=M, reverse link transmission can be sent on a HARQ interlace set. In another design, interference mitigation trigger messages and mitigation request messages for all HARQ interlace sets may be transmitted in a single HARQ interlace set. The bit map can cover different frames of different HARQ interlace sets and can indicate which messages are applicable to which HARQ interlace sets. For example, as shown in FIG. 5, in one design, information for short-term interference mitigation of the forward link may be transmitted in a frame separated by a predetermined spacing. Similarly, for example, as shown in Figure 7, a message for reverse link short-term interference mitigation can be sent in a frame separated by a predetermined spacing. This design implicitly provides time information that simplifies operations and reduces the burden. In another s, the time information can be explicitly provided in the message. For example, a given message may request a response after a specified number of frames or may refer to a resource in a specified number of lL δί1 boxes later in 136198.doc -26- 200939824. This design offers greater flexibility. The arrow a ^ ° key path short-term interference mitigation scheme in Figure 5 can be different in several respects from the reverse wire _ ° hard-circuit short-term interference mitigation scheme in Figure 7. For the forward link, Lu's servo base station can send an interference mitigation trigger message to instruct the terminal to send a mitigation request message on "A. For the reverse link, the base station can send a L-Train capability request message to direct the terminal to transmit the power decision pilot on the reverse link. The messages displayed in Table 1 and in Figures 5 and 7 and the 遂Λ ^ ^ ^ pilots can be sent in various ways. Table 2 lists the available messages and pilots according to a design. - Some channels. Table 2 Message/Pilot Interference Mitigation Trigger Transmission Capability Request FL resource grant RL resource grant in the forward link of the forward link forward link on the forward shared control channel (F- SCCH) or physical downlink control channel (PDCCH) transmission is transmitted on F-SCCH or PDCCH. Transmission on F-SCCH or PDCCH transmits mitigation request forward link or reverse chain on F-SCCH or PDCCH The way is sent on the forward link RUM channel (F RUM) or PDCCH for the forward link. On the reverse link RUM channel (R-RUM) or physical uplink control channel (PUCCH) for the reverse link Send. Power determines the pilot forward link or reverse link

The RQI reverse link is sent on the forward link power decision pilot channel (F-PDPICH) for the forward link. The reverse link is transmitted on the reverse link power decision pilot channel (R-PDPICH). Sending on the RQ1 channel (r-RQich) or pucch I36I98.doc -27- 200939824 It is also possible to send the table and the messages and pilots shown in Figure 5 and Figure 7 in other ways. In another design, the servo base station can transmit an interference mitigation trigger message or a transmission capability request message to the terminal along with the forward link data. In still another configuration, the servo base station can transmit the interference mitigation trigger message and/or the mitigation interference request message to the adjacent base station via the backhaul. As described above, the message for short-term interference mitigation can be sent so that it can be reliably received by the receiving end station. In one design, the interference mitigation information can be sent on the reverse link on the first segment where other reverse link transmissions can be cleared. Similarly, a mitigation request message can be sent on the forward link on a second segment that can clear other forward link transmissions. This design ensures reliable mitigation request messages can be sent on the forward and reverse links. The λ body and t can transmit such messages on a control channel that can be orthogonalized with respect to the primary interferer. The orthogonalization can be achieved by using an f source (e.g., a set of subcarriers, a set of frames, etc.) that is not used by the primary interferer. In one design, on the forward link, messages for short-term interference mitigation can be sent on a single harq interlaced set parameter, and on the reverse link, can be sent on a single-corresponding HARQ interlace set for short-term interference mitigation. Message. This design allows for efficient resource partitioning between access points and backhaul links between different base stations and between repeaters (e.g., at different power levels). For this. Sixty and one, because the same HARQ interlace set will also provide control transmission for other links, resource partitioning can be achieved with the granularity of one harq interlace on each link. For this design, if a cooperation from an interfering base station or an interfering terminal is required to enable reliable communication from reception, then the HARQ interlace set can be awarded as a unit. This cooperation; 136198.doc • 28- 200939824 Take the form of control blockade or HAR error set split. Limiting the message to the single-key on each key_ HARQ also supports forwarding messages via the repeater. For example. The relay station can receive the interference mitigation request message from the terminal and can forward the message upstream to the interference base station or another relay relay station, and can also receive the mitigation request message from the base station and can lower the message : Forward to the terminal or another station. The upstream/downstream segmentation can be carried out for the Cui position. For example, the terminal can transmit a mitigation request message on the HARQ interlace set a, and the relay station can forward the message on the hARQ interlace set 6, where α is off 5. For the forward link and reverse link (4), the base station can make a pre-scheduling decision before the actual schedule, for example, when the alarm generates the interference mitigation trigger message in Figure 5 or when generated in Figure 7. Pre-scheduling decisions are made when transmitting capability request messages and mitigating interference request messages. Depending on the time, the actual schedule decision may be the same as the pre-schedule decision 〜 ~ 仰 1 』 and can not be the same. For example, &, if the resource is estimated to be _ $ σ # # τ && 贝 00 bad system, then the parameter resources can not be assigned to the terminal. As described above, on the forward link, the 伺服 servo base station can transmit the interference mitigation trigger message of the specified resource to a terminal and can use this resource for the terminal. For example, if the schedule decision 改变 changes after transmitting the interference mitigation trigger message, then the servo base station also uses this resource for the other terminal. In this case, the 'servo base station' selects the MCS for the terminal without using the RQI information available for the other terminal or the most recent RQI information. On the forward link, the servo base station T schedules no high-interference line terminals from neighboring base stations without transmitting the interference mitigation trigger signal 136198.doc -29- 200939824. On the reverse keyway, the servo base station can schedule terminals that are not strong interferers of neighboring base stations without transmitting a transmission capability request message. The servo base station can make such a decision based on the pilot measurement report from the terminal. Scheduled terminals can allow for more efficient resource utilization when scheduled without the use of short-term interference mitigation. • In the case design, subsampling can be used to reduce the burden of messages for short-term interference mitigation. A scheduling period of s frames per HARQ interlace set may be used, where s may be determined by the desired sub-sample size, and 8 may be any suitable integer value. The mitigation request message can be transmitted for each _ pure transmission on a given HARQ interlace set, and the scheduling decision can be valid for s frames on the erroneous set. The scheduling period of different harq interlaces can be interleaved with respect to time to reduce the initial latency caused by subsampling. In one design, the interference mitigation trigger message, the transmission capability request message, and/or the mitigation interference message may contain persistent elements.定 Set this bit to Φ as the first value (for example, |〇,) to indicate that the message is valid for a nominal time period (for example, a frame), or set to a second value (for example, , factory) to indicate that the message is valid for an extended period of time (eg, a predetermined number of frames). The short-term interference mitigation techniques described in this article can be used in a variety of deployment scenarios. These techniques can be used in systems where all base stations are targeted to giant cells. Such techniques may be invoked for cell edge terminals that can observe high interference from neighboring base stations on the forward link and/or can cause high interference to neighboring base stations on the reverse link. 136198.doc -30- 200939824 These techniques can also be used to support, for example, systems for base stations transmitting at different power levels for jumbo, microcell and picocells. Some base stations can also be deployed in an unplanned manner (ie, without any network plan). In addition, the base station can support restricted associations and may not allow all = terminals to connect to the base station. The restricted association can be applied, for example, to a base station installed in the home where only users living in the home can be connected to the base station.技术 The techniques described herein can be used for (4) primary interference scenarios, which may be unavoidable or desirable. For example, the terminal may not be allowed to connect to the base station with the strongest received power (e.g., due to the base station allowing restricted association). This base station can be the main interferer. As another example, the terminal can be intended to connect to a base station having a lower received power (if the base station has a lower path loss). For example, t*, if the base station has a transmission power level that is significantly lower than the transmission power level of other base stations (eg, for a micro cell or a pico cell) and may therefore cause less interference to the system to achieve a similar data rate. (It is what is needed) 'It may be the case. Other base stations with higher received power at the terminal will be the primary interferers. On the reverse link, transmissions to base stations with lower path loss can cause less interference in the system, which is desirable. Figure 9 shows the process of receiving data in the case of interference mitigation in the new period _ by the first station, the first station can be the terminal for the data transmission on the forward link or for the reverse key The data transmission on the road is a servo base station. Process _ can be used in the transmission scheme I36198.doc 200939824 500 in FIG. 5 or the transmission scheme 700 in FIG. The first port can generate a first message to request mitigation of interference (block 912). The first message may include information identifying at least one resource to be mitigated, an indication of priority of the request, a target interference level of the first station, a target reduction of transmission power of the interfering station, and may be used by the interfering station Do not manipulate the spatial information of power and/or other resources in the same direction as the first one. For example, in the event that data is expected to be received on at least one resource, the first station can transmit the first message to at least one interfering station to request ® to mitigate interference on the at least one resource (block 914). The first station can send the first message as a unicast message to each interfering station or as a broadcast message to all interfering stations. Thereafter, the first station can receive a data transmission (block 916) from a second station on the at least one resource. For example, as shown in Figure 5, in one design, process 9 can be used for data transfer on the forward link. In this case, the first station can be a terminal, and the second station can be a servo base station. The terminal may receive a second message from the server base station to trigger short-term interference mitigation and may send the first message in response to receiving the second message. For example, a, as shown in Figure 7, in another design, process 9 can be used for data transmission on the reverse link. In this case, the first station can be a servo base station' and the second station can be a terminal set. The servo base station can receive a resource request from the s-terminal terminal and can send the first message in response to receiving the resource request. Figure 10 shows the design of the device 1000 that is not used to receive data in the event of short-term interference mitigation. The apparatus 1000 includes: a module 1012 for generating a first message to request 136198.doc • 32-200939824 to mitigate interference; and a method for transmitting the first to at least the interfering station to request to mitigate at least one resource: In the case of group purchase, the first message is sent in the case that the data is expected to be received by the first Α &&;;;;;;;;;;;; 至少 至少 至少 至少 至少 至少 至少 至少 至少 至少 至少 至少 至少 至少 至少 至少The station receives a data transmission module 1〇16. ' (4) Demonstrate the design of the HOG process for receiving the jitter on the forward keyway in the case of short-term interference mitigation. Process U can be performed by a terminal (as described below) or by some of its two entities. . . Process 110. Can be used in the transmission scheme of Figure 5 = (final £ = available from the servo base station - triggering short-term interference mitigation (block 1112). The terminal can then send a message to request at least one interfering base station to mitigate at least - The interference on her source (block 1U4). The terminal: the device can send the request message in the expectation of receiving data on the at least one resource* [trigger message received in block (1)2). The terminal may receive at least one transmission or φ pilot from the at least one interfering base station (block 111 6). Every value is + broadcast 〆 quot "transmission or pilot can indicate a corresponding interference to the violent platform at at least self-confidence, β π

', the transmission power level used. The terminal may estimate the channel quality (block 1 Π 8) from the at least one transmission or pilot of the at least - resource frequency, f = 〇 from the at least - interference A. The terminal can indicate the at least one resource eve 45 4 ^. The information of the D quality is sent to the servo base station. The terminal device can receive the channel source grant based on the at least one resource (block 1122). The terminal can also transmit data from the server to the at least one resource (block 1124). Receiving the 136198.doc -33-200939824 one less transmission or pilot on the at least one resource in the time period and receiving on the at least one resource in a second time period later than the first time period The data is transmitted.

Figure 12 shows the design of an apparatus for receiving data on the forward link in the event of short-term interference mitigation. The device 1 comprises: - a module 1212 for receiving a message triggering short-term interference mitigation from a feeding base station; and a module 1214 for transmitting a message requesting at least one interfering base station to mitigate interference on at least one resource The request message is sent if it is expected to receive data on the at least one resource; - a module 1216 for receiving at least one transmission or pilot from the at least one interfering base station;模组-Interfering base station at least - transmitting or piloting a module 1218 for estimating channel quality of the at least one resource; Group 1220; - a module 1222 for receiving a resource grant based on the channel quality of the at least - resource; and - a module 1 224 for receiving a data transmission from the servo base station on the at least - resource. Figure 13 shows the process 1300 for receiving bedding on the reverse link in the event of short-term interference mitigation. Process 1300 can be performed by a feeding base station (described below) or by some other entity. Process 13A can be used in the transmission scheme 700 of FIG. A terminal receives a resource request (block the servo base station is available from 1312). The serving base station can transmit a - message to request at least one of the interference terminals to mitigate interference on at least one of the resources (block 1314). The servo base may send the first message if it is expected to receive data on the at least one resource (e.g., in response to receiving a resource request). The base station may also send a second message to request the terminal's transmission capability for the at least one resource (block 1316). The serving base station can receive a transmission (3 power decision pilot) for the transmission capability of the terminal for the at least one resource (block 131 (10) the base station can be based on the terminal for the at least - resource The transmission capability schedules the terminal for data transmission (block 1320). The servo base station can then receive data from the terminal on the at least one resource (block 1322). φ ❹ In the - item design The base station can receive pilots from the terminal and the at least one interfering terminal, and each pilot is transmitted by a corresponding terminal at a maximum transmission power level available for the at least-resource. The feeding base station may estimate the channel mouth quality of the at least one resource based on the received pilot frequency and may select, adjust, and encode based on the estimated channel quality of the at least one resource. The servo base station may A resource grant containing the modulation and coding side is sent to the terminal. The terminal can transmit the data transmission according to the resource grant. Figure 14 shows the use on the reverse link in the case of short-term interference mitigation. The device 14〇〇 includes: a module 1412 for receiving a poor source request from a terminal, 用于, for transmitting a first message to two: - interference terminal The module that mitigates interference on at least one resource is sent under the expectation that the data is received on the at least one resource; and is used to send the second message to the gentleman of the at least one resource. a module 1416 for the end of the machine, a module 1416 for the j target; one for receiving the 匕δ, the ', the end machine for the at least one module 1418; the transmission capacity for the transmission of the 胄 source The module 1420 for transmitting the terminal based on the terminal for the at least one resource 136198.doc -35-200939824; and one for the at least one resource The terminal receives a data transmission module 1422. Figure 5 shows the design of the process for mitigating interference. The process 1500 can be performed by the interfering station, which can interfere with data transmission on the forward link. Base station or for data transmission on the reverse link Interfering with the terminal. The process 1500 can be used in the transmission scheme 5 of FIG. 5 or the transmission scheme 700 in FIG. 7. Ο ❹ the interfering station can receive one of the interferences transmitted by a first station to request mitigation of at least one resource a first message (block 1512). The first message can be sent by the first station if the first station is expected to receive data on the at least one resource. In one design, the interfering station can The first message obtains the priority of the request. The interfering station can then decide whether to grant or discard the request based on the priority of the request. The interfering station can mitigate interference on the at least one resource (block 1 5 14). In one design of block 1514, the interfering station can reduce the target of obtaining transmission power from the first message. The interfering station can then reduce its transmission power on the at least one resource by a reduction in the amount based on the target of the transmission power. In another design of block 1514, the interfering station may obtain spatial information from the first message. The interfering station can then perform precoding based on the spatial information to manipulate the power of the interfering station in a direction different from the first station. The interference station can also mitigate interference on the at least one resource in other ways. Figure 16 shows the design of a device 16 for mitigating interference. The device 16 (9) includes: a module 1612 for receiving a first message sent by a first station to request mitigation of at least one resource on the 136198.doc-36 - 200939824::scrambling-first message, the first message being the first message °, expected to be transmitted by the first station in the case of receiving data on the at least one resource; and a module 1614 for mitigating interference on the at least one resource. The modules of Figures 12, 14 and 16 may comprise processors, electronics, hardware devices, electronic components, logic circuits, memory, etc., or any combination thereof.

Figure 17 is a block diagram showing the design of the servo base station 11 干扰, the interference base station 11 〇 y, and the terminal unit 图 2 图 in Figs. 4 and 6 . At the servo base station 11, the transmission processor 1714 can receive the traffic data from the data source ηΐ2χ and the message from the controller/processor 〇Χ3〇Χ and the scheduler 173. For example, the controller/processor 1730 can provide the information shown in Figures 5 and 7 for short-term interference mitigation. The scheduler 1734 can provide resource grants for the terminal. The transport processor 1714 can process (e.g., encode, interleave, and symbol map) the traffic data, messages, and pilots and provide data symbols, control symbols, and pilot symbols, respectively. Modulator (MOD) 1 7 1 6χ Modulates the data symbols, control symbols, and pilot symbols (for example, for OFDM, CDMA, etc.) and provides output samples. The wheel transmitter (TMTR) 1 718x is adjustable (e.g., 'converted to analog, amplified, filtered, and upconverted) to output samples and produces forward link signals that can be transmitted via antenna 1 720x. The interference base station 1 1 〇y can similarly process the traffic information and messages of the terminal and the interference terminal that are served by the base station 1 1 〇x. The traffic data, messages, and pilots can be processed by the transport processor m4y, modulated by the modulator I716y, adjusted by the transmitter 1718y, and transmitted via the antenna 172〇y. 136198.doc -37- 200939824 At terminal 120, antenna 1752 can receive forward link signals from base station 11 〇 x & 〇 以及 y and other base stations. The Receiver (RCVR) 1754 is tunable (eg, filtered, amplified, downconverted, and digitized) from the received signal from antenna 1752 and provides samples. Demodulation Transducer (DEMOD) 1756 . Demodulates the sample and provides the detected symbols. Receive processor 1 758 can process (e.g., symbol demap, deinterleave, and decode) the detected symbols to provide decoded message data to data store 〇 76 and decode the message (eg, Provided to (IV) II / Process H 177G for resource grant and short-term interference mitigation. Demodulation transformer 1756 can estimate the channel quality of the specified resource and can provide the estimated channel quality to controller/processor 1770. On the reverse key path, the transport processor 1782 can receive and process the traffic data from the data source 1780 and the message from the controller/processor 177 (eg, for resource requests and short-term interference mitigation) and provide data symbols and Control symbol. The modulator 1784 can perform modulation on the data symbols, control symbols, and pilot symbols 且 and can provide output samples. The transmitter (10) can adjust the output samples and generate a reverse link signal that can be transmitted via the antenna 1752.反向 Each base station 'reverse link signal from terminal 120乂 and other terminals can be received by antenna mo, adjusted by receiver 174〇, demodulated by demodulation transformer 1742 and processed by receiver processor (10) . The processor can provide the decoded traffic data to the data collector 1746 and provide the decoded message to the controller/processor 173. The demodulation transformer 1742 can estimate one or more of the terminal 120x. The channel quality of the 5 汲 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 / or other parameters β controller / processor 1730 χ, I730y and 1770 can respectively guide the operation of the base stations 110x and 110y and the terminal 12 〇 x. The memory 1732 \, 1732 y and 1772 can be stored for the base station 11 分别 respectively. The data and code of the terminal and the terminal 120x. The scheduler 173 and the 1734y can respectively schedule the terminals communicating with the base stations 110x and 11 〇y and can allocate resources to the terminal.

The processor shown in Figure 17 can perform various functions for the techniques described herein. For example, the processor at terminal 12 can direct or implement process 900 in FIG. 9, process 11 in FIG. 11, process 1500 in FIG. 15, and/or for the techniques described herein. Other processes. The processor at each base station no can direct or implement the process 9 of Figure 9, the process 1300 of Figure 13, the process of Figure 15 (8), and/or other processes for the techniques described herein. . Those skilled in the art will appreciate that information and signals may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and the like, which may be referenced by the above description, may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or light particles, or any combination thereof. Chip. It will be further appreciated by those skilled in the art that the various illustrative logical blocks, modules, circuits, and algorithm steps described herein in connection with the present disclosure can be implemented as an electronic hardware, a computer software, or a combination of both. To clearly illustrate this interchangeability between hardware and software, J. Xiongwang, above, has generally described various illustrative components, ρ^ & ghosts, modules, circuits, and steps in terms of functionality. This functionality I36198.doc •39- 200939824 is implemented as hardware or software depending on the particular application and design constraints imposed on the overall system. The skilled person can implement the described functionality in different ways for each particular application, but this calculation will not be construed as causing a departure from the scope of this disclosure.

实施 Various illustrative logic blocks, modules, and circuits described herein in connection with the present disclosure may be implemented or implemented by: a (four) processor, a digital signal processor (DSP), a special application integrated circuit ( Asic), Field Programmable Gate Array (mFPGA) or other programmable logic device, discrete idle or transistor logic, discrete hardware components, or any combination thereof that performs the functions described herein. A general purpose processor may be a microprocessor, but alternatively the processor may be any conventional processor, controller, microcontroller or state machine. The processor can also be implemented as a combination of computing devices, e.g., a combination of a Dsp and a microprocessor, a plurality of microprocessors, one or more microprocessors connected to the same DSP core, or any other such configuration. The steps of the method or algorithm described herein in connection with the present disclosure may be directly implemented in hardware, a software module executed by a processor, or a combination of both. The software module can reside in RAM memory, flash memory, R〇M memory, EPROM memory, EEPROM memory, scratchpad, hard disk, removable disk, CD_ROM or any known in the art. Other forms of storage media. An exemplary storage medium is coupled to the processor such that the processor can read information from the storage medium and write the information to the storage medium. Alternatively, the storage medium can be integrated into the processor. The processor and storage media can reside in the ASIC. The ASIC can be resident in the user terminal. Alternatively, the processor and storage medium can reside as discrete components in the user terminal 136198.doc -40- 200939824. In one or more exemplary designs, the functions described may be implemented in any combination of hardware, software, lemma, or f. If implemented in software, the functions may be stored as one or more instructions or code on a computer readable medium or transmitted through a computer readable medium. Computer-readable media includes both computer storage media and wanted media, including any media that facilitates the transfer of a computer program from one location to another. The storage medium can be any available media that can be accessed by a general purpose or special purpose computer. By way of example and not limitation, such computer-readable media may comprise RAM, ROM, EEPR (10), cd r〇m or other optical disk storage device, disk storage device or other magnetic storage device, or may be used to carry or store instructions or The required code components in the form of data structures and which may be accessed by a general purpose or special purpose computer or a general purpose or special purpose processor may be referred to as any computer readable medium as appropriate. For example, 'If you use coaxial electrical gauges, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, you can transfer software from websites, feeds, or other remote sources. Coaxial electron microscopy, fiber optic line, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of the media. Disks and optical discs as used herein include compact discs (CDs), laser discs, optical discs, digital versatile discs (DVDs), flexible discs, and Blu-ray discs, where the discs are typically magnetically regenerated. Optical discs use optical lasers to reproduce data optically. Combinations of the above should also be included in the scope of computer readable media. The previous description of the disclosure is provided to enable a person skilled in the art to make or use the disclosure. For those skilled in the art, various modifications of the present disclosure will be readily apparent, and the general principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Variety. Therefore, the present disclosure is not intended to be limited to the examples and designs presented herein, but should be accorded the broadest scope of the principles and novel features disclosed herein. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 shows a wireless communication system.

Figure 2 shows the data transfer in the case of hybrid automatic retransmission (Harq). Figure 3 shows a binary channel tree for a set of subcarriers. Figure 4 shows the data transfer on the forward link (fl). Figure 5 shows the FL data transmission in the case of short-term interference mitigation. Figure 6 shows the data transfer on the reverse link (rl). Figure 7 shows the RL data transmission in the case of short-term interference mitigation. Figure 8 shows the multiplex of FL data transmission and RL data transmission in the case of short-term interference mitigation. Figures 9 and 10 respectively show processes and apparatus for receiving data in the event of short term interference mitigation. Figures 11 and 12 respectively show a process and apparatus for receiving data on a forward keyway in the event of short-term interference mitigation. Figures 13 and 14 respectively show a process and apparatus for receiving data on a reverse link in the event of short term interference mitigation. 15 and 16 respectively show processes and apparatus for mitigating interference. Figure 17 shows a block diagram of a terminal and two base stations. [Main component symbol description] 136198.doc -42- 200939824 100 Wireless communication system 110 Base station 110χ Servo base station llOy Interference base station 120 Terminals 120x Terminals - 120y Interference terminals 130 System controller ❹ 300 Channel tree 500 transmission Solution 700: The transmission scheme 1000 is configured to receive 1012 JeL for short-term interference mitigation. The module 1014 for generating a first message to request mitigation is used to send the first message from a first station to at least one interference station. And transmitting, by the requesting group, a mode group that mitigates interference on at least one resource, where the first message is sent by the first station on the at least one resource, for sending information on the at least one resource A second module 1200 for receiving a data transmission is used by the device 1212 for receiving data on the forward link in the case of short-term interference mitigation for receiving a message for triggering short-term interference mitigation from a servo base station. Send a message to request at least one interference base station minus 136198.doc -43· 200939824 1216 121 8 1220 ® 1222 1224 1400 1412 1414 1416 1418 1420 Light at least one resource-interfering module for receiving at least one transmission or pilot module from the at least one interfering base station for receiving from at least one interfering base station And at least the transmitting or piloting module for estimating the channel quality of the at least one resource is configured to send information indicating the channel quality of the at least one resource to the module of the serving base station for receiving, based on the at least one resource Channel quality generation module for granting a data transmission module from the servo base station on the at least one resource for receiving data on the reverse link in the case of short-term interference mitigation a module for receiving a resource request by a terminal for transmitting a first message to request at least one module that interferes with the terminal to mitigate interference on at least one resource, the first message being expected by the servo base station at the at least one Sending a second message to request a module of the terminal for transmission capability of the at least one resource, if the resource receives the data And a module for receiving a transmission including a transmission capability of the terminal for the at least one resource, for transmitting the data based on the terminal for the at least one resource 136198.doc -44·200939824 1422 The module for scheduling the terminal is configured to receive a data transmission module 1600 1612 from the terminal device on the at least the resource for the device for mitigating interference

❹ 1614 1712x 1714x 1714y 1716x 1716y 1718x 1718y 1720x 1720y 1730x 1730y 1732x 1732y 1734x 1734y is used to receive a module sent by a first station to request to mitigate one of the first messages of interference on at least one resource, the first message is The first station transmits a processor to the module h source transmission processor to reduce the interference on the at least one resource in the case that the first station is expected to receive data on the first resource. Transmitter Transmitter Transmitter Antenna Antenna Controller/Processor Controller/Processor Memory Memory Scheduler Scheduler 136198.doc -45- 200939824 1740x Receiver 1740y Receiver 1742x Demodulation Transformer 1742y Solution Modulator 1744x Receive Processor '7444 Receive Processor 1746x Data Reservoir 1746y Data Reservoir ❹ 1752 Antenna 1754 Receiver 1756 Demodulator 1758 Receive Processor 1760 Data Reservoir 1770 Controller/Processor 1772 Memory Volume 1780 Data Source 1782 Transfer Processor 1784 Modulator 1786 Transmitter 136198.doc -46 -

Claims (1)

200939824 X. Patent application scope: 1. A method for wireless communication, comprising: transmitting a first message from a first station to at least one interference station to request: at least - interference on resources, the first The message is sent if the first station is expected to receive data on the at least one resource; and - a data transmission is received from a second station on the at least one resource. 2. The method of claim, wherein the first station is a terminal and the second station is a base station, and wherein the data is received on the forward link. ❹ 3. The method of claim </ RTI> wherein the first station is a base station and the second station is a terminal, and wherein the data is received on the reverse link. 4. The method of claim 1, further comprising: generating the first message to include information identifying the at least one resource. 5. The method of claim </ RTI> further comprising: generating the first message to include an indication of the priority of the request. 6. The method of claim 1, further comprising: generating the first message to include a target reduction of the transmission power of the interfering station. 7. The method of claim 1, further comprising: generating the first message to include a target interference level of the first station. 8. The method of claim 1, further comprising: generating the first message to include spatial information that can be used by an interfering station to manipulate power in the direction of a flute->J々, 〇. 9. The method of requesting item i wherein the sending the first message comprises: transmitting the first message as a broadcast message to all of the at least one 136198.doc 200939824 scrambling station. The method of claim 1 wherein the sending of the first message comprises: , U as a unicast message is sent to each of the ones.谡 D D. The method of claim 1, the further comprising: receiving a second message from ^ tit = σ to trigger a short-term interference mitigation, wherein the first message is sent in response to receiving the second message.如 ❹ 12. The method of claim 1, further comprising: receiving a resource request from the second station, wherein the first message is sent in response to receiving the resource request. 13. A device for wireless communication comprising: a second at least a processor configured to: assert a first message from a first. Sent to at least the cadre station to request to mitigate at least the resource spoofing, the first message being reversed if the first station is expected to receive data on the at least two resources. The at least one resource receives a data transmission from a second station. 14. The device of claim 13, wherein the at least one processor of the cookware is configured to generate the first message to include at least one of: a combination of: identifying information of the at least one resource Priority of the request - indication; one of the first target interference levels; one of the transmission powers of one thousand piles of 二 丄 丄 + interference σ is reduced; and can be used by an interference station A different spatial information from the power of the first station. 15. The device of claim 13, wherein the at least-processor is configured to: receive a second message from the second station to trigger a short-term interference mitigation; and respond to 136198.doc -2-200939824 16 17 ❹ 18. ❹ 19. 20. The first message is sent after receiving the second message. The apparatus of claim 13, wherein the at least - processor is configured to: from . First. The & f source request; and in response to receiving the resource, please send the first message. An apparatus for wireless communication, comprising: means for transmitting a first message from a first station to at least one interference station to reduce at least - interference on resources, the first message being in the month ^ - the station transmits if the data is received on the at least -f source; and: the means for receiving a data transfer from a second station on the at least one resource. The device of claim 17, further comprising: 7 pieces for generating the first message to include at least one of: identifying information of the at least one resource; one of the priority of the request: 丄One of the first interference levels of the first station; the transmission power of the interference station is reduced; and an interference station can be used for spatial information to manipulate power in a direction different from the first station. The device of claim 17, further comprising: :: receiving a second message from the second station to trigger short-term interference mitigation, wherein the first message is in response to receiving the _th transmission. 4 汛 汛 而 凊 凊 凊 凊 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 And send. I36198.doc 200939824 21. A computer program product, comprising: a computer readable medium, comprising: for causing at least one computer to send a first message from at least one interfering station to a first port of $7 to the eye Reducing at least one resource code, the first sentence is sent from the first station in the expected receipt of the data; the second source on the A source is used to make the code At least _ the computer is at least receiving - the data transmitted by the code. Originally, a method for wireless communication, comprising: receiving a message sent by a first station to request at least mitigation of interference on a resource - the first message is transmitted by Dangdang. And the first station transmits the information on the at least one resource expected to be received by the first port; and the second station mitigates interference on the at least one resource. 23. The method of claim 22, It further includes: obtaining the priority of the request from the first message; and determining whether to grant or discard the request based on the priority of the request. 24. The method of claim 22, wherein the mitigating interference comprises: obtaining a target reduction of the transmission power from the first message; and reducing the transmission power of the second station on the at least one resource by one This target of transmission power reduces the amount of determination. 25. The method of claim 22, wherein the mitigating interference comprises: obtaining spatial information from the first message; and performing precoding based on the spatial information to manipulate the second station in a direction different from the first station power. 136198.doc -4. 200939824 26. Apparatus for wireless communication comprising: a to y processor configured to: receive by a first station to: mitigate at least one of interference on a resource a first message, wherein the first message is sent by the first station in anticipation that the first station receives data on the at least one resource; and the second station mitigates interference on the at least one resource . 27. The apparatus of claim 26, wherein the at least one processor is configured to: obtain a priority of the request from the beta A; and determine whether to grant or discard the request based on the request . 28. The device of claim 26, wherein the at least one processor is configured to: obtain a transmission power from the first message - a target reduction; and reduce a transmission power of the second station on the at least - resource Small - the target based on the transmission power reduces the amount of the decision. Such as &quot;monthly device 26', wherein the at least-processor is configured to: obtain spatial information from the first message; and perform pre-compilation based on the space f to be different from the first station The power of the second station is manipulated in the direction. A method for wireless communication, comprising: transmitting a first message from a terminal to request at least one interference base to mitigate interference on at least one resource, wherein the first message is expected to be The terminal device transmits the data on the at least one resource; on the at least one resource, the y is received from a servo base station. The data transmission wheel 31. The method according to the phase 3, further includes : Receiving a second trigger from the servo base station that triggers short-term interference mitigation, 13619S.doc 200939824 32. 33. 34. • 35 36. The first message is in response to receipt. The method of sending a message to the child is as follows: the method includes: receiving at least one of the at least one interfering base station or the pilot transmission or the pilot indication to be used - the corresponding interference base is used - Transmission power level. The method of claim 32, further comprising: estimating a channel quality of the at least one resource based on the at least one from the at least one interfering base station; &amp; transmitting or piloting indicating the channel quality of the at least one resource Information is sent to the service base station. The method of claim 30, further comprising: receiving at least one pilot from the at least one interfering base station on the at least one resource in a first time period, wherein the data transmission is later than the first time period Receiving on the at least one resource in one of the second time periods. An apparatus for wireless communication, comprising: at least one processor configured to: send a first message from a terminal to request at least one interfering base station to mitigate interference on at least one resource' And transmitting, when the terminal machine is expected to receive data on the at least one resource; and receiving a data transmission from a servo base station on the at least one resource. The apparatus of claim 35, wherein the at least one processor is configured to: receive a second message triggering short-term interference mitigation from the servo base station; and 136198.doc -6 - 200939824: should receive the The second message sends the first message. The device of claim 35, wherein the at least _ processor is configured to: receive at least - pilot from the interfering base station, each pilot being sent to the corresponding interfering base station at the at least rate level; (4) from one to the other, using one of the transmission functions (4) from the at least one interfering base station, the frequency estimate phase is at least the source of the channel f; and will indicate the quality of the channel to 38 II--Beiyuan The information is sent to the servo base station. ❹ A method for wireless communication, comprising: transmitting a --message from a base station to request at least - interfering with the terminal to mitigate at least - on the agent _ &gt; I % ... interference on the source 'this - the message is sent if the base is expected to receive data on the at least - resource; and 39 such as: At least one resource is received from a terminal - data transmission. 39. The method of claim 38, further comprising: transmitting a second message to request the terminal for transmission capability to the terminal; Receiving a transmission including the terminal for the at least one force; and the remote transmission capability of the transmission energy source of the resource is for scheduling the terminal based on the terminal for the at least the data transmission. 40. The method of claim 38, further comprising: transmitting, from the terminal and the at least one interfering terminal, a corresponding terminal to transmit the power level for the at least one time; The channel is estimated based on the received pilots, and the channel quality selection 136198.doc 200939824 is based on the at least one resource; the channel quality selection-modulation and coding based on the estimated at least one resource And the dual-machine will include the modulation and coding scheme (4) sent to the terminal 41. A device for wireless communication, comprising: 至少 at least one processor configured to: from a base station Sending a message to request at least one interfering terminal to mitigate at least one resource spoofing 'the first message is sent by the base station in the case where the at least one: receiving data is received', and at least one The resource receives a data transmission from a terminal. 42. The device of claim 41, wherein the sending-second message is processed by the requesting device to be configured to: send w μ for the Less-resource transmission of this force, receiving-containing the terminal for the at least one resource:::: transmission; and based on the terminal to the to: force to schedule the terminal for the data transmission. As with the device of phase 41, the terminal and the heart of the Xiaoli 11 are configured to: receive the trial from the interference terminal to the terminal device, and use one of the available terminals: the receiving frequency master-pilot system The rate is determined to be transmitted. The channel of the largest resource of the resource is based on the received pilot material. The at least quality selection is based on the estimated channel quality of the at least one resource. The resource plan of the channel scheme of the change and compilation will include the modulation and coding, and will be sent to the terminal. J36198.doc